check-qjson: Simplify around compare_litqobj_to_qobj()

Make compare_litqobj_to_qobj() cope with null, and drop non-null
assertions from callers.

compare_litqobj_to_qobj() already checks the QType matches; drop the
redundant assertions from callers.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <1487363905-9480-5-git-send-email-armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>

tests/check-qjson.c

@@ -1110,7 +1110,7 @@ static void compare_helper(QObject *obj, void *opaque)
 
 static int compare_litqobj_to_qobj(LiteralQObject *lhs, QObject *rhs)
 {
-    if (lhs->type != qobject_type(rhs)) {
+    if (!rhs || lhs->type != qobject_type(rhs)) {
         return 0;
     }
 
@@ -1184,18 +1184,12 @@ static void simple_dict(void)
         QString *str;
 
         obj = qobject_from_json(test_cases[i].encoded);
-        g_assert(obj != NULL);
-        g_assert(qobject_type(obj) == QTYPE_QDICT);
-
         g_assert(compare_litqobj_to_qobj(&test_cases[i].decoded, obj) == 1);
 
         str = qobject_to_json(obj);
         qobject_decref(obj);
 
         obj = qobject_from_json(qstring_get_str(str));
-        g_assert(obj != NULL);
-        g_assert(qobject_type(obj) == QTYPE_QDICT);
-
         g_assert(compare_litqobj_to_qobj(&test_cases[i].decoded, obj) == 1);
         qobject_decref(obj);
         QDECREF(str);
@@ -1299,18 +1293,12 @@ static void simple_list(void)
         QString *str;
 
         obj = qobject_from_json(test_cases[i].encoded);
-        g_assert(obj != NULL);
-        g_assert(qobject_type(obj) == QTYPE_QLIST);
-
         g_assert(compare_litqobj_to_qobj(&test_cases[i].decoded, obj) == 1);
 
         str = qobject_to_json(obj);
         qobject_decref(obj);
 
         obj = qobject_from_json(qstring_get_str(str));
-        g_assert(obj != NULL);
-        g_assert(qobject_type(obj) == QTYPE_QLIST);
-
         g_assert(compare_litqobj_to_qobj(&test_cases[i].decoded, obj) == 1);
         qobject_decref(obj);
         QDECREF(str);
@@ -1367,18 +1355,12 @@ static void simple_whitespace(void)
         QString *str;
 
         obj = qobject_from_json(test_cases[i].encoded);
-        g_assert(obj != NULL);
-        g_assert(qobject_type(obj) == QTYPE_QLIST);
-
         g_assert(compare_litqobj_to_qobj(&test_cases[i].decoded, obj) == 1);
 
         str = qobject_to_json(obj);
         qobject_decref(obj);
 
         obj = qobject_from_json(qstring_get_str(str));
-        g_assert(obj != NULL);
-        g_assert(qobject_type(obj) == QTYPE_QLIST);
-
         g_assert(compare_litqobj_to_qobj(&test_cases[i].decoded, obj) == 1);
 
         qobject_decref(obj);
@@ -1403,8 +1385,6 @@ static void simple_varargs(void)
     g_assert(embedded_obj != NULL);
 
     obj = qobject_from_jsonf("[%d, 2, %p]", 1, embedded_obj);
-    g_assert(obj != NULL);
-
     g_assert(compare_litqobj_to_qobj(&decoded, obj) == 1);
 
     qobject_decref(obj);